BestPig released a new version of freeBOOT ToolBox - a tool that allows to create and customize a freeBOOT image based on an original or XBR/freeBOOT dump.
This new version of course comes with "freeBOOT" 12611/v0.04 (fbBuild 0.1) support.
There's also a new debug option that will show any error coming from ibuild or fbuild.
To create a new "freeBOOT" v0.04 image the program can take in a freeBOOT v0.032, XBR or original dump for 16Mb NANDs, for 256/512 you will need an original NAND dump.
Rev2 fixes some problems with SMC and KV.